Abstract
By using Braun Blanquet methodology Tibouchino longifoliae - Sticherion bifidi was studied restricted to the banks made with bulldozer during the build of roads in Sierra del Purial and Maquey geological formations rocks in the more rainy zone of the Cuban archipelago. Generally it is found between 30 to 80 degrees slopes over schists banks of ferralitics soils. They are secondary meadow, composed for the immediate secondary communities generally rich in ferns, the greatest number of species that make up this alliance are heliophilous. Three assocciations were found Nephrolepido biserratae - Bidentetum pilosi, Pitirogrammo calomelani - Rhytidophylletum exserti and Stichero bifidi - Gleichenelletum pectinatae that are subassociations and variants. Weather is tropical with rainfalls between 1200 and 2500 mm.
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